I cant vote, you didnt add a choice for drivers that decide on a daily bassis.
I normally decide what to drive based on my mood when I walk out the door.
If it's nice weather I might take the Jeep topless or one of the Harleys, bad weather I might take the 2wd Chevy or the 4wd Tacoma, feeling like I should save gas I might drive the wifes HHR. Heck I'm getting ready to go to work in the next half hour and still havent decided what to drive.

4 x 4 is must in our house...not only for me but also my wife (she love's the truck almost as much as I do). We love to camp, off-road on some pretty aggressive trails, play in the snow, etc. Plus living in Colorado, a 2 wheel drive usually needs sandbags in the bed at least a few times as year. Both of my trucks before this one were 2 wheel drives and were sometimes challenging to get around in on icy days.